<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="3" process-status="wait" align-center style="margin-bottom:
40px;"
    >
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="发布课程"/>
    </el-steps>
    <div class="ccInfo">
      <img v-if="coursePublish.cover" :src="coursePublish.cover" height="100%" width="100%">
      <div v-else>该书没有封面</div>
      <div class="main">
        <h2>{{ coursePublish.title }}</h2>
        <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ coursePublish.subjectLevelOne }} — {{ coursePublish.subjectLevelTwo }}</span></p>
        <p>课程讲师：{{ coursePublish.teacherName }}</p>
        <h3 class="red">￥{{ coursePublish.price }}</h3>
      </div>
    </div>
    <div>
      <el-button @click="previous">返回修改</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程
      </el-button>
    </div>
  </div>
</template>
<script>
import course from '@/api/course'

export default {
  name: 'CoursePublish',
  data() {
    return {
      coursePublish: {},
      courseId: '',
      saveBtnDisabled: false // 保存按钮是否禁用
    }
  },
  mounted() {
    if (this.$route.params.id) {
      this.courseId = this.$route.params.id
      this.getCoursePublishById(this.courseId)
    }

  },
  methods: {
    previous() {
      this.$router.push({ path: '/course/chapter/' + this.courseId })
    },
    publish() {
      this.publishCourseById(this.courseId)
      this.$router.push({ path: '/course/list' })
    },
    async getCoursePublishById(id) {
      const r = await course.getCoursePublishById(id)
      if (r.code === 20000) {
        this.coursePublish = r.data.coursePublish
      } else {
        this.$message.warning('数据拉取失败')
      }
    },
    publishCourseById(id) {
      course.publishCourseById(id).then(response => {
        this.$message.success(response.message)
      }).catch(error => {
        this.$message.error(error.message)
      })
    }
  }

}
</script>

<style scoped>
.ccInfo {
  background: #f5f5f5;
  padding: 20px;
  overflow: hidden;
  border: 1px dashed #DDD;
  margin-bottom: 40px;
  position: relative;
}

.ccInfo img {
  background: #d6d6d6;
  width: 500px;
  height: 278px;
  display: block;
  float: left;
  border: none;
}

.ccInfo .main {
  margin-left: 520px;
}

.ccInfo .main h2 {
  font-size: 28px;
  margin-bottom: 30px;
  line-height: 1;
  font-weight: normal;
}

.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}

.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}

.ccInfo .main h3 {
  left: 540px;
  bottom: 20px;
  line-height: 1;
  font-size: 28px;
  color: #d32f24;
  font-weight: normal;
  position: absolute;
}
</style>
